Draw a filled circle

Plots a filled circle with given radius, center and color.

Description

FILLEDCIRCLE Filled circle drawing

filledCircle(CENTER,R,N,COLOR) draws a circle filled with COLOR that has CENTER as its center and R as its radius, by using N points on the periphery.

Usage Examples,

filledCircle([1,3],3,1000,'b');
filledCircle([2,4],2,1000,'r');

If you would like to generate the screenshot image above, you could do this:

filledCircle([1,3],3,100,'k');
hold on
filledCircle([-0.25,4.25],1,100,'r');
filledCircle([2.5,3],1,100,'g');
filledCircle([0.1,1.7],1,100,'b');
axis off

Best.

Acknowledgements

Draw A Circle. inspired this file.

• MATLAB release: MATLAB 7.10 (R2010a)

[David-Leon]

This addon has a bug (I guess). It changes the aspect ratio of my plot.

[Sadik]

Hi Irvin,

I am not sure I understand your question thoroughly but here is what you can do for transparency:

% Filled object becomes more and more transparent as the following variable [transp] goes to zero. [Max value is 1]
transp = 0.5;
set(h,'FaceAlpha',transp);

Best.

[irvin rynning]

In the code using a white fill
h=fill(X,Y,'w');
results in the same circle with white center.
how to make it transparent ?

[Aziz]

 

[Sadik]

Hi Catalin,

You may want to check if you are playing with the axes, especially whether or not the code is making a zooming effect.

If you can't figure that out, using the clf command of matlab, or closing and reopening the figure window at each iteration should solve the problem.

Best.

[Catalin Eberhardt]

Hi Sadik, I am having some problems using filledCircle - the first time I use the function to draw a couple of circles, they are displayed at a certain size, but then the second time (e.g. second iteration of a for loop) they are displayed slightly bigger, even though the function was called with the same RADIUS parameter. Do you know why that might be? Thanks very much!

[Catalin Eberhardt]

Very useful, thank you!

[Tima Tima]

Thank you for more simple and more useable code